The notification system has been having some problems over the last couple weeks. This is affecting many users (myself included). Here is the general state of the different types of notifications:
- Instant notification for subscribed threads or private messages works some of the time. No pattern for when it does or doesn't as far as I can see.
- Daily notification for subscribed threads and forums does not work at all
- Weekly notification for subscribed forums (probably threads as well ... but I haven't actually checked) appears to work fine
Unlike previous e-mail issues, we do not have a workaround. At least not at the moment.